Propagation of solitary waves over double submerged barriers

Yun Ta Wu, Shih-Chun Hsiao

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Protection of nearshore area by means of artificial structure is an important issue for coastal engineering community. In this study, we aim to investigate wave hydrodynamics and hydrodynamic performance due to solitary waves interacting with double submerged barriers. Double barriers, put bottom-mounted vertically on the flat seafloor and also paralleled to each other, are considered as a wave absorber. New experiments are carried out to provide measured data for model validation. Numerical simulations are performed using a depth- and phase-resolving model, based on the Reynolds-Averaged Navier-Stokes equations with a non-linear k-ε turbulence closure model. Model-data comparisons show good agreements in terms of free surface fluctuations in time histories and error analyses are performed. Numerical results are then used to study the variations of the free surface motions of breaking waves and the flow fields. In particular, the model results reveal that the optimal horizontal distance, judged as minimum wave transmission, between two submerged barriers is approximately 2.5 times the still water depth for present wave conditions and obstacle geometries. Furthermore, numerical model is extended to evaluate the functional efficiency of a dual-slotted-barrier system with different obstacle configurations under various conditions of solitary waves by means of energy reflection, transmission and dissipation coefficients.

Original languageEnglish
Article number917
JournalWater (Switzerland)
Volume9
Issue number12
DOIs
Publication statusPublished - 2017 Nov 26

Fingerprint

solitary wave
Hydrodynamics
Solitons
Wave transmission
hydrodynamics
coastal engineering
breaking wave
Water
model validation
Navier-Stokes equations
Coastal engineering
flow field
dissipation
water depth
seafloor
turbulence
Navier Stokes equations
Numerical models
Flow fields
engineering

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Geography, Planning and Development
  • Aquatic Science
  • Water Science and Technology

Cite this

@article{3f756c558d174447a574805bbc0eda3b,
title = "Propagation of solitary waves over double submerged barriers",
abstract = "Protection of nearshore area by means of artificial structure is an important issue for coastal engineering community. In this study, we aim to investigate wave hydrodynamics and hydrodynamic performance due to solitary waves interacting with double submerged barriers. Double barriers, put bottom-mounted vertically on the flat seafloor and also paralleled to each other, are considered as a wave absorber. New experiments are carried out to provide measured data for model validation. Numerical simulations are performed using a depth- and phase-resolving model, based on the Reynolds-Averaged Navier-Stokes equations with a non-linear k-ε turbulence closure model. Model-data comparisons show good agreements in terms of free surface fluctuations in time histories and error analyses are performed. Numerical results are then used to study the variations of the free surface motions of breaking waves and the flow fields. In particular, the model results reveal that the optimal horizontal distance, judged as minimum wave transmission, between two submerged barriers is approximately 2.5 times the still water depth for present wave conditions and obstacle geometries. Furthermore, numerical model is extended to evaluate the functional efficiency of a dual-slotted-barrier system with different obstacle configurations under various conditions of solitary waves by means of energy reflection, transmission and dissipation coefficients.",
author = "Wu, {Yun Ta} and Shih-Chun Hsiao",
year = "2017",
month = "11",
day = "26",
doi = "10.3390/w9120917",
language = "English",
volume = "9",
journal = "Water (Switzerland)",
issn = "2073-4441",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "12",

}

Propagation of solitary waves over double submerged barriers. / Wu, Yun Ta; Hsiao, Shih-Chun.

In: Water (Switzerland), Vol. 9, No. 12, 917, 26.11.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Propagation of solitary waves over double submerged barriers

AU - Wu, Yun Ta

AU - Hsiao, Shih-Chun

PY - 2017/11/26

Y1 - 2017/11/26

N2 - Protection of nearshore area by means of artificial structure is an important issue for coastal engineering community. In this study, we aim to investigate wave hydrodynamics and hydrodynamic performance due to solitary waves interacting with double submerged barriers. Double barriers, put bottom-mounted vertically on the flat seafloor and also paralleled to each other, are considered as a wave absorber. New experiments are carried out to provide measured data for model validation. Numerical simulations are performed using a depth- and phase-resolving model, based on the Reynolds-Averaged Navier-Stokes equations with a non-linear k-ε turbulence closure model. Model-data comparisons show good agreements in terms of free surface fluctuations in time histories and error analyses are performed. Numerical results are then used to study the variations of the free surface motions of breaking waves and the flow fields. In particular, the model results reveal that the optimal horizontal distance, judged as minimum wave transmission, between two submerged barriers is approximately 2.5 times the still water depth for present wave conditions and obstacle geometries. Furthermore, numerical model is extended to evaluate the functional efficiency of a dual-slotted-barrier system with different obstacle configurations under various conditions of solitary waves by means of energy reflection, transmission and dissipation coefficients.

AB - Protection of nearshore area by means of artificial structure is an important issue for coastal engineering community. In this study, we aim to investigate wave hydrodynamics and hydrodynamic performance due to solitary waves interacting with double submerged barriers. Double barriers, put bottom-mounted vertically on the flat seafloor and also paralleled to each other, are considered as a wave absorber. New experiments are carried out to provide measured data for model validation. Numerical simulations are performed using a depth- and phase-resolving model, based on the Reynolds-Averaged Navier-Stokes equations with a non-linear k-ε turbulence closure model. Model-data comparisons show good agreements in terms of free surface fluctuations in time histories and error analyses are performed. Numerical results are then used to study the variations of the free surface motions of breaking waves and the flow fields. In particular, the model results reveal that the optimal horizontal distance, judged as minimum wave transmission, between two submerged barriers is approximately 2.5 times the still water depth for present wave conditions and obstacle geometries. Furthermore, numerical model is extended to evaluate the functional efficiency of a dual-slotted-barrier system with different obstacle configurations under various conditions of solitary waves by means of energy reflection, transmission and dissipation coefficients.

UR - http://www.scopus.com/inward/record.url?scp=85035354679&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85035354679&partnerID=8YFLogxK

U2 - 10.3390/w9120917

DO - 10.3390/w9120917

M3 - Article

AN - SCOPUS:85035354679

VL - 9

JO - Water (Switzerland)

JF - Water (Switzerland)

SN - 2073-4441

IS - 12

M1 - 917

ER -